Control Command Format; Answer Format; Error Code - Canon VC-C50i/VC-C50iR Programmer's Manual

4. Control Command Format

This format is to transmit from the computer to VC-C50i.
Header
Header : 1 byte FFh
Device Num : 2 byte 3030h~3039h (Device number in cascade connection)
Command : 2 byte (refer to 12. Details of Pedestal Control Commands
Parameter : Variable length If not specified, parameter manifests hexadecimal, transmits
End mark : 1 byte EFh
Just after power on, device number is 3030 and each device number is determined by Cascade
ON control command.
The control command (Global Command) of device number 3030 became valid to all VC-C50i
connected in Cascade ON status.

5. Answer Format

5.1 Answer Format
This answer format corresponds to the control command transmitted from the computer to
VC-C50i.
Header
Header : 1 byte FEh
Device Num : 2 byte 3030h~3039h (Device number in cascade connection)

Error Code

: 2 byte manifested error flag In hexadecimal and return it's ASCII code.
Status : Variable length If not specified, status manifests hexadecimal, transmits
End mark : 1 byte EFh
Under the condition in Cascade Connection ON, the answer corresponding to control
command of device number 3030, is returned only to the last device connected in cascade.
5.2 Error Code
Error code manifests error flag in hexadecimal and returns it's ASCII code. If not exists error,
all bits of error flags are cleared and becomes zero.
• The bit assignment of error flag.
b7(MSB) b6
Mode error Parameter error
1st byte b7: Mode Error
b6: Parameter Error
b5: Command Error
b4: Busy
Device Num Command
~ 14. Details of System Control Commands)
its ASCII code.
Device Num Error Code
its ASCII code.
b5
Command error
Parameter
Status
b4 b3
System
Busy
reservation
In case of wrong mode
In case of receiving wrong parameter
In case of receiving wrong command
In case of unable to execute by error
12
End mark
End mark
b2 b1
System System
reservation reservation
b0(LSB)
System error